18280568 has 8 divisors (see below), whose sum is σ = 34276080. Its totient is φ = 9140280.

The previous prime is 18280567. The next prime is 18280571. The reversal of 18280568 is 86508281.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1142528 + ... + 1142543.

It is an arithmetic number, because the mean of its divisors is an integer number (4284510).

Almost surely, 2^18280568 is an apocalyptic number.

It is an amenable number.

18280568 is a deficient number, since it is larger than the sum of its proper divisors (15995512).

18280568 is a wasteful number, since it uses less digits than its factorization.

18280568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285077 (or 2285073 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 18280568 is about 4275.5780895687. The cubic root of 18280568 is about 263.4287848527.

The spelling of 18280568 in words is "eighteen million, two hundred eighty thousand, five hundred sixty-eight".